Caitlin's Book of Shadows (Antique Magic #1.5)
Though their fame became legend, a rumor cropped up about the Fulmer family: Something terrifying stalked Caitlin and her beloved Trevor. Something the bits and pieces she left claimed she had to make sense of. When the curator of their collection finds Caitlin's long forgotten diary, she wonders will it explain why she thought her world twisted? If she really became a witch?